National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Overcast

34°F

1°C

Humidity 87%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 7 Dec 6:15 pm EST
Extended Forecast for

2 Miles S Exton PA

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Southwest wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 25 mph.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 30. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 30 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 13. North wind around 5 mph becoming calm.

    Low: 13 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Increasing clouds, with a high near 34. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 34 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 28. Southwest wind around 5 mph.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Mostly cloudy, with a high near 45. Chance of precipitation is 40%.

    High: 45 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.

    Low: 26 °F

    Chance Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 23. Southwest wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 25 mph.
Monday
Partly sunny, with a high near 30. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 13. North wind around 5 mph becoming calm.
Tuesday
Increasing clouds, with a high near 34. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 28. Southwest wind around 5 mph.
Wednesday
A chance of rain. Mostly cloudy, with a high near 45. Chance of precipitation is 40%.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Mostly sunny, with a high near 41.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.
Friday
A chance of rain and snow before 1pm, then a chance of snow. Partly sunny, with a high near 36. Chance of precipitation is 30%.
Friday Night
A chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 31.
Saturday Night
Partly cloudy, with a low around 18.
Sunday
Mostly sunny, with a high near 30.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Exton PA
 40.01°N 75.64°W (Elev. 476 ft)
Last Update:
6:09 pm EST Dec 7, 2025
Forecast Valid:
6pm EST Dec 7, 2025-6pm EST Dec 14, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation